package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetMealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetMealDishMapper setMealDishMapper;

    /**
     * 新增菜品
     *
     * @param dishDto
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDto) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDto, dish);
        //向菜品表dish插入1条数据
        dishMapper.insert(dish);
        //获取菜品的主键值
        Long dishId = dish.getId();
        List<DishFlavor> flavors = dishDto.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            //向口味表dish_flavor 插入n条
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //批量插入
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 分页查询
     *
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult PageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 批量删除
     *
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        ids.forEach(id -> {
            Dish dish = dishMapper.getById(id);
            //判断当前要删除的菜品是否为起售中
            if (dish.getStatus() == StatusConstant.ENABLE) {
                //如果是起售中，抛出业务异常
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        });

        //判断当前要删除的菜品是否被套餐关联了
        List<Long> setMealIds = setMealDishMapper.getSetmealIdsByDishIds(ids);
        if (setMealIds != null && setMealIds.size() > 0) {
            //如果关联了，抛出业务异常
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品表中的数据
        ids.forEach(id -> {
            dishMapper.deleteById(id);
            //删除口味表中的数据
            dishFlavorMapper.deleteByDishId(id);
        });
    }

    /**
     * 获取详情
     *
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(long id) {
        //根据id查询菜品
        Dish dish = dishMapper.getById(id);
        //根据id查询关联口味
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        //封装DishVO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     * 编辑
     *
     * @param dishDTO
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //修改菜品表dish
        dishMapper.update(dish);
        //删除当前菜品关联的口味数据，操作dish_flavor,执行delete操作
        dishFlavorMapper.deleteByDishId(dish.getId());

        //插入最新的口味数据，操作dish_flavor,执行insert操作
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

//    @Override
//    @Transactional
//    public void startOrStop(Integer status, Long id) {
//        Dish dish = Dish.builder()
//                .id(id)
//                .status(status)
//                .build();
//        dishMapper.update(dish);
//
//        if (status == StatusConstant.DISABLE) {
//            //如果是停售操作，还需要将包含当前的套餐特停售
//            List<Long> dishIds = new ArrayList<>();
//            dishIds.add(id);
//            List<Long> setMealIds = setMealDishMapper.getSetmealIdsByDishIds(dishIds);
//            if (setMealIds != null && setMealIds.size() > 0) {
//                for (Long setMealId : setMealIds) {
//                    Setmeal setmeal = Setmeal.builder()
//                            .id(setMealId)
//                            .status(StatusConstant.DISABLE)
//                            .build();
//                    setmealMapper.update(setmeal);
//                }
//            }
//
//        }
//    }
}

